** Shares of Australia's Panther Metals rise as much as 50% to A$0.030, on track to record their best day ever, if gains hold

** Stock at its highest level since Aug 28

** Mineral explorer says numerous gold nuggets discovered at Comet Well and Comet Well South project areas

** 22.7 mln shares change hands, vs 30-day average volume of 643,441 shares

** Stock has fallen 38.1% YTD, as of 0030 GMT

(Reporting by Roshan Thomas in Bengaluru)

((Roshan.Thomas@thomsonreuters.com))